I agree with Daniel, there is still no official way to copy settings (I copied a few of the settings files over from ~/Library/Preferences and it sort of worked.
In fact, if you are doing EPUB, you are going to want to upgrade as soon as possible. And a lot of enhancements to EPUB export.A Preview button in the New Document dialog box.Ability to make QR codes in your documents.A Hi-DPI interface, so that it looks awesome on Retina and other high-resolution displays (which required hand-redrawing thousands of icons, by the way).The Dark UI (which you can, fortunately, make lighter? though never as light as CS6 was).
A new font menu in the Control and Character panel to allow “fuzzy” searching for font names (think of it like Quick Apply for fonts).There are a few cool new features however, including:
Hey, in case you missed it? Adobe shipped InDesign CC last night! As you may know, there are not a lot of new features in IDcc (or IDCC or however you want to initialize it), because Adobe undertook the massive job of decarbonizing the app on the Mac OS and making it 64-bit capable.